Box-strapping tool



G. WOOD.

BOX STRAPPING TOOL.

APPLICATION FILED JAN. 22. 1920.

Patented. Oct. 17, 11922.

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G. WOOD.

BOX STRAIPPING TOOL.

APPLICATION FHFD JAN, 22. 1920.

Patented Oct. 117, 1922.

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.G. WOOD BOX STRAPPING TOOL.

APPLICATION FILED JAN- 22. I920.

Patented Oct. 17, 1922.

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EOX-STRAPIPING TOQL.

Application filed January 22, 1920. Serial No. 3533M.

T all whom it may concern Be'it-known that T, Gnonen Woon, a citizen of the United States of America, and resident of the city of Seattle, county of King, and State of Washington, have invented certain new and useful improvements in Box-Strapping Tools, of which the following is a specification.

My invention relates to tools designed for use in applying reinforcing wires as hoops or hands about boxes, packages and the like and consists of certain novel features of construction which have been illustrated in the drawings and which will be hereinafter described and then particularly defined by the claims terminating-this specification.

The object of my invention is to provide a tool for doing this work, which will be rapid in operation and which will not only stretch the wire and form the twist or knot, but which will also trim the ends of the wire outside'of the knot, so as to remove any projecting ends which might cause trouble.

An object of my invention is to produce a wire cutter, in combination with a wire tying machine, which will cut the wire at both ends closer to the knot than in the ordinary type of machines, thus leaving no projecting ends to damage other packages or ersons in transit or handling.

nother object is to provide a wire cutter in connection with a wire tying machine which is operable independently of the tying mechanism, and which ma be operated after theknot is entirely finlshed.

A still further object is the provision of a tightening mechanism which will not bend a wire in such a manner that the portion held therein cannot be used for the next shown my tool and the manner of its opera-,

tion, the same being in the form of construc= tion which 1 most prefer to use,

band to be put about the box, in this manner igure 4 is a sectional elevation taken substantially upon the. plane indicated by the lIHBfir-i of Figure 2.

Figure 5 is a side elevation showing that cutter and the means for operating the same which is located at the right hand side of the machine as shown in Figure 2.

F1gure 6 is a section taken through the wire tightening mechanism just above the holding ratchet.

This tool is designed for forming the type of knot which is made by placing the two ends of the wire close alongside each other and then twisting the central portion of the two wire sections, while holding said wlre sections against twisting at a distance alittle removed from the point where the twist is applied. In consequence, the two Wire ends are twisted together to form two twist sections, one being twistedrighthandedly and the other left-handedly'. This knot is, in itself, an oldform of knot and the use hf the mechanism for forming the same in the manner described is, broadly stated, old. Such mechanism employs two holding members 2 and 20,and a twisting member 3, which latter is in the form of a small gear, having a slot 30 therein for the reception of the two wires.

The small pinion 3, is herein shown as immediately turned by means of an idler I pinion 31, which in turn is turned by the gear, or gear segment, 32. The gear 32 is operated through the means of a lever 33, which is secured thereto, or to the shaft upon 'which the gear is mounted. This mechanism is old excepting as to the particular form of the lever 33. As herein shown, this lever is provided with a head in the fprm of a yoke havin two parts, 34, one of which lies at each si e of the gear 32.

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position to conform to the location of the slot 12 in the frame 1.

This frame is provided with a toe 10, which forms the lower half of the slot 12. This slot is of such size as to receive the wires 15 which form the hoop and also to permit the wires to be twisted while occupying the slot. At each end of the slot the holding bars 2 are placed. The slots in these holding bars are just wide enough to permit the free insertion and removal of the wires bein employed, but not wide enough to permit the wires being twisted.

Close outside of one'end of theslot 12, is provided a wire holding dog 4. This dog is pivoted, as at 40, so that the toothed end face, as 41, which engages with the wire, is eccentric to the pivot. An anvil 42 which co-operates with the dog 4, is located just beneath the position occupied by the wire. Normally the dog 4 is held down into wireengaging and holding position, both by its own weight and by the action of a spring 43.

In'commencing the operation of forming the loop the end of the wire is first secured by the dog 4 and then placed within the slot 12 in the frame and the slots of the holding bars 2 and 20. It also enters the slot 30, in the twisting pinion, said pinion being, at that time, in position so that its slot is facing outward. The wire is then carried about the package and brought back and insertedin the same slots alongside the first portion of the wire. It is carried beyond the twisting mechanism and is engaged by the tightening mechanism, shown as a whole at 5, this being located as close to the twisting mechanism as it may be conveniently placed and operated.

This tightening mechanism employs a disk 50, which is secured to the overhung end of a vertically mounted shaft 51, which shaft is mounted to turn in an arm, as 11. of the main frame. The disk 50 is provided with a groove, as 52, which extends about it peripherally. This groove is shown as being made slightly eccentric to the outer-periphery of the dog and to its axis. This gives it a sufficient depth that, at one point, it may be provided with a holding slot, as 53, into which the wire may be inserted and bent upwardly. When this is done it will hold the wire sufficiently well that. by turning the disk 50. the wire may be drawn quite tightly. The disk is separated from other parts so as to permit free passage of the wire across its face.

The turning'of the disk is done through a lever, as 6, which is mounted upon the shaft 51 and which is provided with any kind of a suitable ratchet or dog device, so that continuous turning of the shaft may be obtained through an oscillating movement of the lever. A holding dog, as 60g engaging with a ratchet wheel 61, serves to'hold the shaft against backward movement.

Alongside of each of the wire holding bars 2 and 20, is placed a cutter bar. These two cutter bars are shown in Figures 4 and 5, each of these being mounted for reciprocating movement in guides carried by the frame. Each of these also acts to out its re.-'

spective Wire by an upward movement. One

which is held by the dog 4. As this end lies inside of or behind the other-end, this cutter is designed for cutting that wire which lies next to it, as is clearly shown in Figure 4. The other cutter, 70, has its cutting edge 71 located farther out, or in position to cut the outside end of the wire, as is clearly shown in Figure 5. It is also provided with a notch, as 72, located between the cutting surface and the body of the cutter, into which the innermost oY the two wires may pass when the cutter is raised.

Each of these cutters is provided with a downwardly facing surface 73 toward the upper end. thereof, which is adapted to b'e engaged by a toe 81, carried by a yoke 8, which yoke is pivoted at 80. This yoke extends across the face of the machine a su'fiicient distance so that it may operate both of the cutters at once. It is provided with two such toes. as 81, one engaging with the cutter 7 and the other with the cutter 70, so

that both are'operated simultaneously. The yoke 8 is also provided with an operating lever 82.

Each of the cutters, 7 and 70,.co-operates with its respective wire-holding bar 20 and 2, to cut the wire. These holding bars 20 and 2 form the other half of'the cutting mechanism. The wires are thus out very close up to the twist and there can be no material length of wire projecting to engage with other goods or to in any way do harm.

The cutter 7 which is at the left hand side of the machine. as shown in Figures 1 and 2,

is provided with a lug or projection 74,

which is so placed with relation to a notch 44 formed in' the adjacent edge of the wire holding dog 4:, that when the cutter is raised it will act as a cam to forcethe holding dog outward and thus release the end 14 out the wire held thereby, so that when this is cut the remnant will be freed In connection with the dog 4 T have shown a lever 9 which is pivoted at 90 upon the frame and is provided with a tooth 91, adapted to engage with a recess 45 formed in the face of the dog 42, when said dog is thrown outward. It thus holds the dog t in position for tree insertion of the wire end. This locking lever holds the do only lightly, so that a slight pressure wil release the same and throw it down into engagement with the end of the wire, when the same has been inserted.

The operation of my device is believed to be evident. lln commencing the operation, the operating lever 33 is thrown backward into horizontal position. Tn this position the slot 30 of the twister wheel will face outwardly and register with the slots both in the frame and in the wire holding bars 2 and 20. The end 14: of the wire is then placed under the holding dog t and the wire passed into the slots in the device, about the box and back and then again in the same slots. The wire is then placed into the peripheral groove in the disk 50 and then brought upward into the holding notch 53. This tightening disk 50 is then turned until the wire has been drawn taut. The next step is swinging the operating lever 33 forward.

The mechanism herein shown is so proportioned that one swing of the lever, which is through 180, will give the twister wheel three complete turns. The number of turns is, however, immaterial, except that it should be enough to furnish a good twist and make a knot which will securely hold. As a matter of fact, the movement of the lever should be slightly more than enough to give the three full turns, the surplus being just enough so that the natural backward turn of the twister, due to the resiliency of the wire, will leave the twister wheelin position so that its wire receiving slot registers with the 'slots in the other parts of the mechanism. After the twist has been made the lever 82 is drawn forward which pulls up the cutters 7 and 70, and cuts 0% the surplus wire. The wire is then slipped out of the tool, or rather, the tool is forced backward away from the knot.

What ll claim as my invention is:

1. Tn a wire tying tool, means for twisting together two parallel wires, and cutters movable from below to cut the surplus wire ends at each end of the twist.

2. In a wire tying tool, means for twisting together two parallel wires, wire cutters each having a member mounted for vertical move ment, one at each end of the twist, said movable members each having an arm extending under the wires and having an upwardly facing cutting edge positioned to engage only one of the wires.

3. A wire tying toool as in claim 1, having a cutter at each end-of the twist cutting by an upward movement, and a pivoted cutteroperating lever having a yoke end adapted to engage both of said cutters to operate them.

4:. In a wire tying tool of the class described, means tor twisting together parallel wire ends, and eccentrically pivoted wire holding dog for one end of the wire, a cutter between said dog and the twister, and means for releasing said dog by the cutter during the cutting movement.

5. In a wire tying tool of the class described, means for twisting together the parallel wire ends, a clutch dog for holding one end of the wire, a wire cutter adapted to cut the wire between said dog and the twister, said dog and cutter having cam surfaces engaging to automatically release the dog by the cutting movement of the cutter.

6. In a wire tying tool of the class described, means for twisting together the par-" allel wire ends, an eccentrically pivoted wire holding dog, a cutter between said dog and the twister adapted to cut the wire held by said dog, said cutter and dog having parts engaging during the cutting movement of the cutterto move the dog into release position.

Signed at Seattle, King County, Washington, this 15th day of January, 1920.

GEORGE WOOD. 

